Hi!
I’m investigating the possibilities of LB before purchasing the license and I’ve a question on the automated Test Material which is very handy and convenient. 
it is said here:
I really wish it could travel this way so I can stop before burning 
the modus operandi for any new material to test would be:
With this behaviour, it would be possible to do a single material test from very low settings to very settings in one try. 
is it something possible? 
thanks
Mat
You can put 1000 in min speed and 300 in max speed, it will run “backwards”.
That’s a fun fact! but it will still run successively from cool to hot on horizontal lines (or hot to cool if going backwards on horizontal lines).
The only difference in your images is the order of when your blocks get burned. Your diagonal build only does more unburned ones first… You do not have to use minimum speed of your laser or maximum power. In fact, you should ballpark the ranges instead of going 0 to 100% of everything.
Also be aware those tiny squares may not be translated into your project, unless you are doing tiny burns or cutouts. I often use fewer squares 25mm on a side, or even rectangles. The Material Test tool is adjustable for your benefit.
You can build your own test grid that will give you control over which shape burns in which order using the shape properties dialog and cut order priority settings. Like this.
Pretty Cool
Strange, my preview always scans top row left to right, no matter how I order the speed and power. Reversing the speed and/or power did not change it.
Edit: I reversed the axis labels and it sweeps from the opposite corner. I think I need a nap!
Yes if I don’t stop it manually before the end (on visual clues), it would do no differences, I agree.
But what I like is to stop the material test when I see it’s becoming to hot. (because I’m not a arsonist 
and don’t like the prospect of fire or lens cleaning appealing )
At the moment, I’m launching several material tests by upping the limits successively. That’s time consuming and that’s different for each material. So a really progressive test would be handy.
that looks exactly like I want! 
How do you do that? Can you elaborate please?
Though I would prefer to use the lightburn test because all the writing and settings are included, I would give your method a try 
I just made these 2 videos after seeing your thread. They are not posted publicly yet, but you can watch them. The first one shows how to make the test grid with your choice of graphic, the second one shows how to use it in your situation.
to be more explicit on the modus operandi for any new material to test:
With this behaviour, it would be possible to do a single material test from very low settings to very settings in one try.
This is a great idea - we made the change to the material test to go cold > hot to try and make the tool safer, and this is a good next possible step there. I’ve bumped the idea in our internal chats Thanks for submitting it!
It’s not quite as simple as you make it out.
100% power at 10000 mm/min “deposits” the same amount of heat as 50% power going 5000 mm/min, or 25% power going 2500 mm/min, so it’s not just a zig-zag, it actually fans out in a non-linear way, like this:
To support this, I’ve had to add code to compute the “heat” amount for a cut layer, and even that has limits - If you do a Multi-layer, for example, I’m ignoring all but the first sub-layer. There would be no meaningful way to compare Line + Fill layers with different power settings.
Heat is computed from power, speed, interval, and pass count. Higher speed or a larger interval gives you less heat. Higher power or pass count gives you more heat. I’m ignoring frequency and Q-pulse (for galvos) mostly because those are non-linear, and hardware dependent.
